Arthur k



(No Model.)

A. KH.: THYLL. CLOTH GUTTINGIAGHINE.

No. 511,563. cPatented Dee. 26, 1893.

umm"mlnmmmmImmun W/TNESSES.' /NVENTOH IIIIIIIHIIIIIII UNrrEn STATESARTHUR K. THYLL, OF NEW YORK, N. Y., ASSIGNOR TO yCUTTER COMPANY, OFSAME PLACE.

PATENT OFFICE.

TH E ELECTRIC CLOTH-CUTTING MAcHlNE.

SPECIFICATION forming part of Letters ,Patent No. 511,563, datedDecember 2e, 1893.

Application iiled March 27, 189.3. Serial No. 467.825. (No model.)

To all whom t may concern..-

Be it known that I, ARTHUR K. THYLL, a subject of the Emperor-ofAustria-Hungary, and a resident'of the city of New York, county of NewYork, and State of New York, have invented certain new and usefulImprovements in Electric Cloth-Cutting Machines, of which the followingis a specification.

My invention has reference to improvements in cloth-cutting machines,especially to that class of cutting machinesin which an electric motoris mounted upon and carried by the machine for operating a disk shapedknife.

The object of this invention is to reduce a much as possible thethickness of all the parts traveling through the cloth when the machineis in operation, and to impart a uniform rotary motion to the cuttingknife.

Another object of said invention is to enable this machine to cut abovethe center of the rotating disk shaped knife, thus reducing the size ofthe knife without decreasing the cutting height of the same. As theaforesaid object will compel me to use a very narrow bearing for thisknife, it is necessaryto apply a special construction to said bearing.

My invention is applicable to cutting machines of any character, but isespecially adapted and is herein illustrated in connection with a typeof over board cutting machines, so called because of its being movedaround by hand over the Work table when in operation, the power fordriving the machine being derived from some suitable source such as anelectric motor mounted upon and carried by the machine, flexibleshafting, or some other similar device.

In the accompanying drawings Figure l, represents a side view of myimproved electric cloth-cutter.V Fig. 2, is a cross section, through thecenter of the same. Fig. 3,shows the section of a special constructionof the disk shaped knife; and Fig, 4 is an enlarged cross section, andpartly a front view of the knife in connection with the improvedbearing.

Referring by letter to the accompanying drawings, A indicates a base,outof any sultable material, having a flat circular shape and if desiredmounted upon anti-friction rollers (not shown), and B indicates astandard castor secured in any other way to the base A'near the centerof the same, supporting on its upper end two bearings C C', and alsohaving on its front and back, sidewardly, extensions carrying one, or ifdesired, and as herein illustrated, two electric motors D D. The upperend of this motor is'provided with a bracket (not shown) supporting thetop bearings of the two armature shafts E E the lower ends of which bearin the two bearings C C', secured to the standard B. Two gear wheels F Fare keyed to the armature shafts E E and mesh into each other. The lowerend of the armature shaft E carries a sprocket wheel G. The circularshaped knife H, is carried by a pin Ifastened to the standard B. Theknife H has a circle of holes h,

- which are the same distance apart as the pins g on the sprocket wheel.The sprocket wheel meshes into these holes, thus imparting the rotarymotion of the armature shafts E E to the disk knife H.

To the lower end of theshaft E is fastened a smaller roller K bearingagainst the side of, and thus preventing the knife H from bending in thedirection of the pressure imparted to the same by the sprocket wheel Gr.

To reduce the noise created by running this machine, it is advisable toprovide the knife H, with side plates L L', Fig. 3, made out of liber,raw hide, or any'other suitable material.

The pin I (Fig. 4) has a semi-circular groove 't' and is surrounded by adivided ring M which also is provided with a semi-circular groove incompleting a circular canal around the pin I, which canal is filled withballs. The ring M is driven into the knife and so bound as to revolvewith the same. Pin I also has a round head N, large enough to prevent awabbling motion of the rotating knife. This arrangement is shown in Fig.4, and it has the object to reduce the friction on the knife-bearing toa minimum, allowing also to make said bearing of a very small width,without any possibledanger of injuring the same by running the knife ata very high speed.

Standard B has an extension O for fastening a handle, and the machinealso carries a suitable switch for starting and stopping the electricmotors.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- 1. In an electric cloth-cutting machine thecombination of a base provided with a standard carrying two bearings,two electric motors mounted on the top of the same, two gear wheelsfastened to the armature shafts of said motors and meshinginto eachother, and a disk shaped knife provided witha circle of holes and a pincarrying lsaid knife, and a sprocket wheel fastened to the lower end ofone armature shaft meshing into the holes of the knife, substantially asset forth.

2. In an electric cloth-cutting machine the combination of two motors,two gear wheels on the armature shafts of said motors meshing into eachother, a sprocket wheel fastened to one armature shaft, a rollerfastened to the other, a disk shaped knife having two side plates and acircle of holes.

3. In an electric cloth cutting machine, the combination of abase,withastandard having two bearings, two.electric motors, the armature shaftsof which are j ournaled in the said bearings and have gear-wheelsmeshing with each other, a sprocket-wheel keyed to one armature-shaft, adisk shaped rotary knife having noise-deadening side-plates, the knifeand side-plates having a circle of perforations which correspond withthe pins of the sprocket-wl1eel, and a roller, keyed to the secondarmature shaft and pressing upon the opposite face of theV knife,substantially as set forth.

In testimony that I claim the foregoing as my invention I have signed myname, in presence of two witnesses, this 16th day of March,

ARTHUR K. TIIYL'L. Witnesses:

L. A. SMITH, E. MILLINGTON WARING.

